Defective pixel value correction for digital raw image frames
AssigneeMicrosoft Technology Licensing, LLC
InventorsSamu Koskinen, Christian Mäkelä
Life of this patent
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Abstract
In one example, at least a portion of a digital raw image frame captured by a digital image sensor is accessed. The accessed at least a portion of the digital raw image frame is de-noised without substantially modifying defective pixel values when present. In response to determining that at least one image frame pixel in the de-noised at least a portion of the digital raw image frame has a defective pixel value: the locations of each of the at least one image frame pixel having a defective pixel value are detected, and each defective pixel value in each detected location is corrected in the de-noised at least a portion of the digital raw image frame or the originally accessed at least a portion of the digital raw image frame.
Claims20
A method, comprising:
- accessing at least a portion of a digital raw image frame captured by a digital image sensor;
- de-noising the accessed at least a portion of the digital raw image frame without substantially modifying defective pixel values when present;
- and
- in response to determining that at least one image frame pixel in the de-noised at least a portion of the digital raw image frame has a defective pixel value:
- detecting the locations of each of the at least one image frame pixel having a defective pixel value;
- and
- correcting each defective pixel value in each detected location in one of the de-noised at least a portion of the digital raw image frame and the originally accessed at least a portion of the digital raw image frame.
An apparatus, comprising:
- an access unit configured to access at least a portion of a digital raw image frame captured by a digital image sensor;
- a first de-noiser configured to de-noise the accessed at least a portion of the digital raw image frame without substantially modifying defective pixel values when present;
- and
- a corrector configured to determine whether at least one image frame pixel in the de-noised at least a portion of the digital raw image frame has a defective pixel value, and if yes, to detect the locations of each of the at least one image frame pixel having a defective pixel value, and to correct each defective pixel value in each detected location in one of the de-noised at least a portion of the digital raw image frame and the originally accessed at least a portion of the digital raw image frame.
A digital camera, comprising:
- a digital image sensor;
- and
- an image processor, comprising:
- an access unit configured to access at least a portion of a digital raw image frame captured by the digital image sensor;
- a first de-noiser configured to de-noise the accessed at least a portion of the digital raw image frame without substantially modifying defective pixel values when present;
- and
- a corrector configured to determine whether at least one image frame pixel in the de-noised at least a portion of the digital raw image frame has a defective pixel value, and if yes, to detect the locations of each of the at least one image frame pixel having a defective pixel value, and to correct each defective pixel value in each detected location in one of the de-noised at least a portion of the digital raw image frame and the originally accessed at least a portion of the digital raw image frame.
Dependencies are inferred from the claim text.